"What happened in Parliament on Tuesday was unfortunate. We condemn it. But we cannot accept the government's claim that the Telangana Bill has been tabled in Parliament. There was trouble in the House. Opposition cannot accept it," Mr Karat said after meeting YSR Congress leader Jagan Reddy in the national capital.
Mr Reddy met Mr Karat to seek his support against the government's move on Telangana.
Mr Karat said, "It is an important Bill and should be discussed in Parliament. Every party and MP has a right to speak on it. Government cannot steamroll it."
YSR Congress, which is stiffly opposing the bifurcation of Andhra Pradesh, is seeking Left support for stalling creation of Telangana.
The opposition has to oppose the undemocratic way of the Centre, he stressed.
YSR Congress is planning to stage a dharna at Jantar Mantar tomorrow on the issue.
Get Breaking news, live coverage, and Latest News from India and around the world on NDTV.com. Catch all the Live TV action on NDTV 24x7 and NDTV India. Like us on Facebook or follow us on Twitter and Instagram for latest news and live news updates.